I think the QR #2 is from design exercises later than SR - C Record? I'll have to look, I have a pair of CR hubs.

For me the clue is the tapered end pieces. On the old ones the housing for the QR cam is shaped like a soup pot, and the nut is a nearly complete cone. On the newer ones the housing is tapered as yours is, and the nut is a similar shape. Based on the "old versions" (Nuovo Tipo, possibly Gran Sport) use of the knurled ring rather than the bail or pail handle, I think the nut on #2 is from a C Record era hub that is lesser than C Record, whatever that might be.